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Read the sentence.
During the Cold War, scientists competed in the "space
Which revision changes the sentence to draw attention
to the object of the action rather than the people or
things performing the action?
race.
The "space race" by competing scientists occurred
during the Cold War
During the Cold War, scientists led the "space race"
competition
During the Cold War "space race," scientists
competed.
The "space race" was a Cold War competition by
scientists

d) The "space race" was a Cold War competition by scientist.

Explanation: D is the best option because it puts "space race" as the subject of the sentence.

The subject is the main focus of the sentence.

Option A does this as well, but the sentence is very wordy and does not do enough to draw attention to "the space race".

Option B keeps the scientists as the subject of the sentence.

Option C makes the "space race" part of a prepositional phrase which can be eliminated.

Hence, Option D is the correct answer.

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation: